Vibrator for induction-coils.



PATENTED DEC. 29, 1903.

R. VARLEY.

VIBRATOR FOR INDUCTION GOILS.

APPLICATIONFILED NOV. 6'. 1903.

NO MODEL.

UNITED STATES Patented December 29, 1903.

PATENT OEEicE.

RICHARD VARLEY, OF PROVIDENCE, RHODE ISLAND, ASSIGNOR TO VARLEY DUPLEXMAGNET COMPANY, A CORPORATION OF NEW JERSEY.

VIBRATORFOR lNDUCTlClN-COELS.

$PEGIFICA'IION forming part of Letters Patent N 0. 748,442, datedDecember 29, 1903.

Application filed November 6, 1908. $erial No. 180,116. (No model.)

To all whom it may concern:

Beit known that LRIOHAED VARLEY, acitizen of the United States, residingat Providence, in the county of Providence and State of Rhode Island,have invented certain new and useful Improvements in Vibrators forInduction-Coils, of which the following is a full, clear, and exactdescription.

This invention relates to vibrators for induction-coils, the objectbeing to provide a circuit-breaker which will be held in its closedcircuit position by a comparatively strong force, while the armaturewhich actuates the circuit-controller is retracted by a comparativelylight force, so that comparatively slight magnetic force is required tomove the armature, but by taking advantage of its momentum to strike ahammer-like blow upon the strongly held circuit closer the latter isforced away from its companion contact and a quick opening of thecircuit obtained. I accomplish this by using a comparatively rigidpivoted circuit-controlling plate held in its closed position by astrong spring and an armature-lever held in its retractile position by acomparatively light spring, the armature-lever being so positioned orformed with respect to the circuit-controlling plate that it onlystrikes the latter to open the circuit after it has nearly completed itsstroke under the magnetic attraction of the coil.

My invention also includes certain details of construction concerningthe mounting of the aforesaid springs in a manner to be adjustedsimultaneously by a single adjustingscrew, also in a flexible permanentconnection of the circuit-conductor with the pivoted circuit-controllingplate, all as Will be hereinafter fully pointed out.

In the accompanying drawings, Figure l is a side elevation of the framein which the vibrator is mounted and which is attached to the head ofthe induction-coil. Fig. 2 is a central section of the same, parts beingshown in elevation; and Fig. 3 is an elevation of that side of the frameand its mechanism which abuts against the head of the induction-coil.

A portion of the casing containing the induction-coil is indicated by A,and the head of the core of the coil by a. Against the head of thecasing is secured a frame B, of hard rubber, fiber, or other suitablematerial, consisting, essentially, of two side pieces 17 7), connectedtogether by a cross-plate Z). In addition to this the frame alsoconsists of metallic plates b and b in which the adj ustingscrews work.

0 is an armature-lever pivoted at c to a bracket 072, secured to theplate 5 This lever carries a soft-iron armature 0 facing the pole a. Onthe back of the lever is a button a presenting a shoulder beneath whicha spring, to be referred to, may rest. At the extremity of thearmature-lever there is a rearward. extension 0, terminating in a hook cd is a substantially rigid plate pivoted at cl to the bracket m andhearing at its forward end against the end of a screw e, which passesthrough and works in plate D The end of the screw and the surface of theplate have corresponding platinum contacts in the circuit to becontrolled. The extremity of lever d projects under the hook c of thearmaturelever, the latter, however, in its retractile position beingsome distance to the rear of the end of the plate, as shown in Fig. 2.fis a lever pivoted atf to said bracket m and carrying two springs g andh, respectively, the former bearing against the plate d, tending to holdit against the screw e, and the latter engaging with the shoulderbeneath button (2 on the arm atu re-lever. Spring g is stronger thanspring h in comparison with the amount of work they have to do, spring gbeing intended to hold the rigid plate 01 firmly against the end ofscrew 6 to maintain the'integrity of the circuit, Whereas spring h issufficiently light to be readily put under momentum by the attraction ofthe pole at.

t' is an adjusting-screw passing through the plate b and bearing againstthe lever f, so that by setting the screw inward or outward the tensionof both springs g and 72. can be simultaneously adjusted withoutmodifying their relative strengths. Each of the setscrews 6 and i areprovided on the under faces of their heads with a row of sockets j, withwhich spring-bolts], set in the plate b en gage to hold the screws atany point of adjustment. These friction-locks have been IOO described inother applications filed by me, and no claim is made herein for them.

The plate 61, While being pivoted directly to the metallic bracket m andbeing therefore electrically connected therewith, is for greatersecurity connected by means of a flexible conductor Zr, which issoldered or pivoted at one end to the plate and at the other end to thebracket.

The operation is as follows: The circuit commanded by the vibratorleadsfrom bracket m through plate d and screw (2. It may be understood alsoto include the primary winding of the induction-coil. The primarycircuit being closed externally, core Ct is energized and attractsarmature 0 The light spring h readily yields, and the lever movesforward,quicklygathering momentum. Near the end of its traverse the hookc strikes a hammer-like blow on the end of lever d and causes the latterto very suddenly leave the end of screw 6 and break the circuit withoutan appreciable spark at the contacts. 0n the opening of the circuit themagnetic attraction ceases and spring h retracts the armature, plate (Ibeing at the same time carried forcibly against the end of screw 6,where a good contact is made by reason of the force of the spring andthe stroke of button 0 The backward movement of the armature carries thehook 0 beyond the end of the lever d, and the circuit being againcomplete the same operation is repeated and continued indefinitely inthe well-understood manner. The force exerted by spring 9 is sufficientto crush any foreign particles that may enter between the contacts, andthe momentum provided for in the action of the armature-lever enables itto overcome the strong spring. By using a light spring for thearmature-lever it will respond to comparatively weak magneticattraction; but this will always be sufficient to open the circuit,because of the momentum created in the lever before it engages the platecl.

Having described my invention, I claim 1. In a vibratilecircuit-controller for in duction-coils, the combination of acircuit-controlling plate, an armature-lever independent thereof and twosprings, one acting upon the plate and the other upon thearmature-lever, the former being stronger than the latter.

2. In a vibratile circuit-controller forinduction-coils, the combinationof a circuit-coutrolling plate, an armature-lever independent thereofand two springs, one acting upon the plate and the other upon thearmature-lever, the former being stronger than the latter, incombination with means enabling the armature-lever to strike a hammer-like blowon the circuit-controlling plate, for the purpose setforth.

3. In a vibratile circuit-controller for induction-coils, thecombination of a circuit-com trolling plate, an armature-leverindependent thereof and two springs, one acting upon the plate and theother upon the armaturelever, the former being stronger than thelatter,in combination with a single screw for simultaneously adjusting thetension of both springs.

4. In a vibratile circuit-controller for induction-coils, a circuit-controlling pivoted plate and an immovable metallic frame, in combinationwith a flexible conductor permanently secured to the plate and to theframe, for the purpose set forth.

5. In a vibratile circuit'controllerforinduction-coils, the combinationof an armature-lever, an independent circuit-controlling plate, anotherpivoted lever having attached thereto two springs, one of which bearsagainst the armature-lever and the other against the circuit-controllingplate and an adjustingscrew bearing against said spring-carrying lever.

In witness whereof I subscribe my signature in presence of twowitnesses.

RICHARD VARLEY.

"Witnesses:

M. M. CRoswELL, WILLETT OHADWIOK.

